I reckon too much money
Of that list I'd pick GTS Coupe or F6 (no XR8 / GT-P ?)
VS is too old these days, why get a GTO instead of a GTS (same for regular Monaro) and IMO the Coupe looks better than the sedan (VX GTS).
Depending on the final use, I prefer the look of the XR8/GT-P (bonnet buldge ftw)... but the performance of the F6 speaks for itself.